I always considered myself a dog person when younger. We had a dog when I was growing up and I've owned a couple myself. I used to be mildly allergic to cats. My eyes would get red and sore if I touched them after stroking a cat. However...
When my girls were children, they begged and begged for a kitten. We ended up getting them one each and I hoped that the allergy would go away after constant exposure. Amazingly, it did. Then we were given two more kittens. Then there were three that were unwanted and going to be put down. Then two that needed hand-feeding. Eventually, we ended up with eighteen. That was insane, I know. I just found it impossible to say "no" when a cat was involved.
That was years ago, and the numbers have dwindled due to old age, three road accidents (none of the drivers stopped) and a couple of cats which decided to voluntarily re-locate to neighbouring houses. Now we are down to two - one quite independent who likes to spend a lot of time outside, the other very clingy and wants to be with me all the time, preferably on my knee.
The problem is the future. Our SiL who lives with us always owned big (and, in my opinion, rather fierce) dogs, before he moved here to be with our DD, and has always wanted another dog. My DD and her little girls also want a dog, but I've always said that it wouldn't be fair on our elderly cats. In a weak moment, I agreed that, when our current cats are no longer with us, we could have a puppy and a couple of kittens at the same time and raise them together. I don't mind a small dog - our other DD had a nice little Cavalier King Charles spaniel, before she emigrated - but SiL doesn't regard them as "real dogs." I don't want a big dog, particularly the sort he likes - German Shepherds, Malamutes, etc - as I'm a bit frightened of them, and would be worried about them being around the children. (His oldest daughter, DD's stepdaughter, was badly bitten by one of his German Shepherds when she was a child, but he says it was her own fault for trying to intervene in a fight between two of the dogs.) Of course, it is our house, etc, but I'm very fond of my SiL and don't want to get in an argument about it. Just got to hope our two ageing cats keep going for a long time!
So...smallish dogs okay, big dogs a bit scary (though our DD in the US has a Bernese Mountain Dog which seems very gentle), but I prefer the quiet affection of my cats.